Description: Perennial herbaceous plant with an upright stem, and simply branched up to 120 cm long. The leaves are pinnate composed of 6-15 pairs of leaflets. The flowers grow in the axils of the leaves,  all faced to one side and collected in clustered purple inflorescences. The fruit is a pod.

Flowering time: June-August

Habitat: meadows, cultivated areas, forest edges.

Interesting fact: in the past, seeds were consumed and used to prepare porridge.